I don’t think it is a good idea to stop a foreign language after ninth grade if you are trying for highly competitive colleges. They want to see you continue foreign language studies at least through 11th grade (unless you are going for an engineering major.)
Is Chinese 3 offered at a community college near you? If you take 3&4 you’d be covered for sure.
note that hs Chinese 3= college Chinese 2 at best but since you took AP you should be able to follow in Chinese3 at a college pace.